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Optimal Building Systems
PO Box 4663
Huachuca City, AZ 85616

The Elephant in the Room - HVAC for High Performance Homes
7 Reasons Why Oversizing is Bad
10 Reasons Why Oversizing Persists
Furnaces in High Perf. Homes
ACCA HVAC QI Checklist
The Case Against HRV Systems
The Case Against Partially Conditioned Basements
Point-of-Use Alternatives to Hot Water Circulation Systems
Tankless Water Heaters
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